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RuO2–SiO2 mixed oxides as corrosion-resistant catalyst supports for polymer electrolyte fuel cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
46206 46435 2013 8 PDF Available
Title
RuO2–SiO2 mixed oxides as corrosion-resistant catalyst supports for polymer electrolyte fuel cells
Abstract

The objective of this study was to evaluate the suitability of mixed oxides of silica (SiO2) and ruthenia (RuO2) for use as electrocatalyst supports in polymer electrolyte fuel cells (PEFCs). The RuO2:SiO2 oxides were synthesized in three different molar ratios (0.1:0.9, 0.3:0.7 and 0.5:0.5). Of these formulations, RuO2–SiO2 (0.5:0.5) displayed high BET surface area (∼290 m2 g−1), high electronic conductivity (>5 S cm−1), and outstanding electrochemical stability (change in double layer capacitance of <10% compared to 360% for Vulcan XC72 carbon upon rigorous accelerated potential cycling tests that mimic automotive drive cycles). The RuO2–SiO2 (0.5:0.5) support material was subsequently catalyzed by deposition of 24 wt% of platinum nanoparticles. The resultant electrocatalyst yielded a mass activity of 50 mA mgPt−1 and an area specific activity of 156.3 μA cm−2 at 0.9 V vs. RHE when tested in a fuel cell operating at 80 °C and 75% relative humidity.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► RuO2–SiO2 is a viable alternative to Vulcan XC-72R carbon. ► In-depth analysis of the fuel cell performance of Pt/RuO2–SiO2 electrocatalyst. ► RuO2–SiO2 electrocatalyst supports exhibit exceptional electrochemical stability.

Keywords
Electrocatalyst support; Polymer electrolyte fuel cell; Carbon corrosion; Mixed metal oxides
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RuO2–SiO2 mixed oxides as corrosion-resistant catalyst supports for polymer electrolyte fuel cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 138–139, 17 July 2013, Pages 43–50
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us